e TTX
       file as-is.
    --recalc-timestamp Set font 'modified' timestamp to current time.
       By default, the modification time of the TTX file will be used.
    --no-recalc-timestamp Keep the original font 'modified' timestamp.
    --flavor <type> Specify flavor of output font file. May be 'woff'
      or 'woff2'. Note that WOFF2 requires the Brotli Python extension,
      available at https://github.com/google/brotli
    --with-zopfli Use Zopfli instead of Zlib to compress WOFF. The Python
      extension is available at https://pypi.python.org/pypi/zopfli
